The Treaty of St Germain, which ended WWI as far as Austria was concerned, is available on line in several different language versions. A parallel-text French and German version is in the Austrian Staatsgesetzblatt for 1920, pp 995-1245, beginning here. Note that it's images of pages, not text. The navigation arrows are in the top right corner.
An English page-image version (10Mb) used to exist on the Foreign and Commonwealth Office database, with the accompanying (10Mb) map. It was this map that had to be used to determine the 'nationality' of Otzi the iceman!
The Australian Treaties database has a plain-text version here. You lose the layout but it's searchable, and a much smaller file
A plain-text version (origin unclear) exists as a PDF file, here. A much-reduced version of the accompanying map is at the bottom of this page.
Here is the cover of the Official British Printing of the Treaty:
and here a much-reduced version of the accompanying map (the original is about 1.0 x 0.8 m!)
©APS. Last updated 25 March 2023